Preheat your oven to 400 degrees. Lightly brush the mushrooms clean with a pastry or bbq brush and scoop out the gills with a spoon...do not wash them...they'll get really soggy!

Place the mushrooms on a lightly greased baking pan and bake for about 10 minutes. Remove the mushrooms from the oven and blot them with a paper towel to remove the excess moisture. Next, turn your oven's broiler to high. Top the mushrooms with the sauce, cheese, olives, and pepperoni slices.

Pop them back in the oven and broil for about 5 more minutes...The pepperoni will brown and the cheese will be melted and bubbly....sooooo good....enjoy!